Word Origin and History for tip over

tip

v.1

"to slope, overturn," c.1300, possibly from Scandinavian, or a special use of tip (n.). Intransitive sense of "fall over" is recorded from 1520s. Related: Tipped; tipping. Tipping point attested by 1972.

tip

v.2

"give a small present of money to," c.1600, "to give, hand, pass," originally thieves' cant, perhaps from tip (v.3) "to tap." The meaning "give a gratuity to" is first attested 1706. The noun in this sense is from 1755; the meaning "piece of confidential information" is from 1845; the verb in this sense is from 1883; tipster first recorded 1862. For urban legendary origin as an acronym,
see here
.